11. [0/4.16 Points] DETAILS PREVIOUS ANSWERS ASWSBE14 8.E.035.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER You may need to use the appropriate appendix table or technology to answer this question. In the spring of 2017, the Consumer Reports National Research Center conducted a survey of 1,007 adults to learn about their major healthcare concerns. The survey results showed that 571 of the respondents lack confidence they will be able to afford health insurance in the future. (a) What is the point estimate of the population proportion of adults who lack confidence they will be able to afford health insurance in the future. (Round your answer to two decimal places.) X (b) At 90% confidence, what is the margin of error? (Round your answer to four decimal places.) (c) Develop a 90% confidence interval for the population proportion of adults who lack confidence they will be able to afford health insurance in the future. (Round your answer to four decimal places.) to (d) Develop a 95% confidence interval for this population proportion. (Round your answer to four decimal places.)10. [-14.16 Points] DETAILS ASWSBE14 8.E.031. You may need to use the appropriate appendix table or technology to answer this question. A simple random sample of 400 individuals provides 104 Yes responses. (a) What is the point estimate of the proportion of the population that would provide Yes responses? E (b) What is your estimate of the standard error of the proportion. 0'5? (Round your answer to four decimal places.) E (c) Compute the 95% confidence interval for the population proportion. (Round your answers to four decimal places.) Em: 9. [2.08/4.16 Points] DETAILS PREVIOUS ANSWERS ASWSBE14 8.E.029.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER You may need to use the appropriate appendix table or technology to answer this question. Customers arrive at a movie theater at the advertised movie time only to find that they have to sit through several previews and prepreview ads before the movie starts. Many complain that the time devoted to previews is too long. A preliminary sample conducted by The Wall Street Journal showed that the standard deviation of the amount of time devoted to previews was 4 minutes. Use that as a planning value for the standard deviation in answering the following questions. (Round your answers up to the nearest whole number.) (a) If we want to estimate the population mean time for previews at movie theaters with a margin of error of 75 seconds, what sample size should be used? Assume 95% confidence. 39.33 X (b) If we want to estimate the population mean time for previews at movie theaters with a margin of error of 1 minute, what sample size should be used? Assume 95% confidence. 628. [0.83/4.16 Points] DETAILS PREVIOUS ANSWERS ASWSBE14 8.E.027. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER You may need to use the appropriate appendix table or technology to answer this question. Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $39,000 and $54,000. Assume that a 95% confidence interval estimate of the population mean annual starting salary is desired. (Round your answers up to the nearest whole number.) What is the planning value for the population standard deviation? 3750 (a) How large a sample should be taken if the desired margin of error is $600? Enter an exact number. (b) How large a sample should be taken if the desired margin of error is $200? (c) How large a sample should be taken if the desired margin of error is $100?5. [0/4.16 Points] DETAILS PREVIOUS ANSWERS ASWSBE14 8.E.017. You may need to use the appropriate appendix table or technology to answer this question. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER from the sample of 50 business travelers follow. An air transport association surveys business travelers to develop quality ratings for transatlantic gateway airports. The maximum possible rating is 10. Suppose a simple random sample of 50 business travelers is selected and each traveler is asked to provide a rating for a certain airport. The ratings obtained 6 4 5 8 7 8 6 3 8 10 8 8 5 9 8 3 8 5 5 4 5 5 2 5 9 9 8 8 9 9 6 9 7 8 3 10 8 9 6 Develop a 95% confidence interval estimate of the population mean rating for this airport. (Round your answers to two decimal places.) X to Enter a number. Need Help? Read It1. [33314.16 Points] PREVIOUS ANSWERS ASWSBE14 B.E.003. You may need to use the appropriate appendix table or technology to answer this question. A simple random sample of 60 items resulted in a sample mean of 70. The population standard deviation is 0' = 10. (a) Compute the 95% confidence interval for the population mean. (Round your answers to two decimal places.) e m (b) Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean. (Round your answers to two decimal places.)